| 초록 |
In the domain of porous materials preparation technology, directional melt crystallization(DMC) is novel promising method because it is simple step and applicable to various polymer. In our study, for these advantages, we developed this method as a surface treatment technology. We treated various polymer surfaces such as polystyrene, polyvinyl alcohol and polyurethane by DMC. We dissolved polymer surfaces by proper solvents and then crystallized the solvents by a directional temperature gradient on the liquid nitrogen. In crystallization step, freezing rate of polymer surface was an important parameter, since polymer dissolution time and dissolved structure were changed by freezing rate. So we controlled freezing rate by pre-cooling polymer surface method. The key achievement of our study is that we successfully prepared treated polymer surfaces of porous and rough surfaces. In addition, we pretty confirmed changing modified surface morphology as for changing freezing rate and polymers. We also confirmed that the hydrophobicity of treated surfaces increased. With this versatile method, various polymer surfaces can be treated conveniently without complex and delicate processing steps. |
